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Organic Fertilizers

10 Best Organic Fertilizers 2025 in the United States

#1

Winner

10.0 score

Miracle-Gro Water Soluble All Purpose Plant Food, Plant Fertilizer for Indoor or Outdoor Plants, Roses, Flowers, Houseplants, Vegetables and Trees, 10 lb.

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Miracle-Gro Water Soluble All Purpose Plant Food, Plant Fertilizer for Indoor or Outdoor Plants, Roses, Flowers, Houseplants, Vegetables and Trees, 10 lb.

Miracle-Gro

10.0 score

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Miracle-Gro Water Soluble All Purpose Plant Food is a versatile, user-friendly fertilizer suitable for various plants, including indoor and outdoor plants, roses, flowers, houseplants, vegetables, and trees. With a significant 10 lb. container, it is designed to cover approximately 4,000 sq. ft. of garden area. This product claims to grow bigger, more beautiful plants compared to those unfed, thanks to its nutrient-rich formula that starts working instantly.

#2
7.9 score

Down To Earth All Natural Fertilizers Organic Fruit Tree Mix 6-2-4, 15lb

Down To Earth All Natural Fertilizers Organic Fruit Tree Mix 6-2-4, 15lb

Down To Earth All Natural Fertilizers

7.9 score

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Down To Earth All Natural Fertilizers Fruit Tree 6-2-4 is designed specifically for fruit trees like apples, pears, plums, and tropical varieties. Its nutrient ratio (6-2-4) provides a good balance of nitrogen, phosphorus, and potassium, which supports healthy leaf and branch growth, flowering, and fruit production. Being organic and OMRI listed means it’s free from synthetic chemicals, making it safe for organic gardening and environmentally friendly.

Rating
7.9
Release Rate

Most important from
729 reviews

Release Rate
Its granular form blends easily into soil and releases nutrients steadily, promoting consistent growth and improved leaf color.
#3
7.6 score

Down to Earth Organic Vegetable Garden Fertilizer 4-4-4, 5 lb – Balanced NPK, OMRI Listed, All-Natural Plant Food

Down to Earth Organic Vegetable Garden Fertilizer 4-4-4, 5 lb – Balanced NPK, OMRI Listed, All-Natural Plant Food

Down To Earth All Natural Fertilizers

7.6 score

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The Down to Earth Organic Vegetable Garden Fertilizer 4-4-4 is a well-rounded option for anyone looking to support their vegetable garden with natural, eco-friendly nutrients. Its balanced 4-4-4 NPK ratio makes it versatile, providing equal parts nitrogen, phosphorus, and potassium to promote strong roots, healthy foliage, and productive fruit development. The fertilizer is made from all-natural ingredients, ensuring that it is free from synthetic chemicals and is safe for beneficial insects, pollinators, pets, and the surrounding environment.

Rating
7.6
Nutrient Content (N-P-K Ratio)

Most important from
3535 reviews

Nutrient Content (N-P-K Ratio)
Recommended by horticulturalists, this product stands out for its solid nutrient content, contributing to healthy buds and blooms.

Top 10 Best Organic Fertilizers 2025 in the United States

#1

Winner

10.0  score
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Miracle-Gro

Miracle-Gro Water Soluble All Purpose Plant Food, Plant Fertilizer for Indoor or Outdoor Plants, Roses, Flowers, Houseplants, Vegetables and Trees, 10 lb.

Release Rate: Instant
Application Method: Watering can or Garden Feeder

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25% OFF

Chosen by 1226 this week

#2
7.9  score
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Down To Earth All Natural Fertilizers

Down To Earth All Natural Fertilizers Organic Fruit Tree Mix 6-2-4, 15lb

Nutrient Content (N-P-K Ratio): 6-2-4
Source of Organic Matter: organic
Release Rate: slow
Soil pH Compatibility: not very acidic or alkaline
Application Method: granular

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#3
7.6  score
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Down To Earth All Natural Fertilizers

Down to Earth Organic Vegetable Garden Fertilizer 4-4-4, 5 lb – Balanced NPK, OMRI Listed, All-Natural Plant Food

Nutrient Content (N-P-K Ratio): 4-4-4
Source of Organic Matter: all-natural
Release Rate: slow-release
Application Method: granular, apply directly or mix

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#4
7.3  score
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Espoma

Espoma Organic Plant-Tone 5-3-3 Natural & Organic All Purpose Plant Food; 4 lb. Bag; The Original Organic Fertilizer for All Flowers, Vegetables, Trees, and Shrubs. - Pack of 2

Nutrient Content (N-P-K Ratio): 5-3-3
Source of Organic Matter: natural and organic ingredients
Release Rate: slow-release
Application Method: apply to soil and water thoroughly

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#5
7.3  score
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Down To Earth All Natural Fertilizers

Down to Earth Organic Fish Bone Meal Fertilizer Mix 4-12-0, 5 lb

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#6
7.3  score
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Down To Earth All Natural Fertilizers

Down to Earth Organic Langbeinite Fertilizer Mix 0-0-22 Granules, 5 lb, Pack of 1

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#7
7.3  score
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Miracle-Gro

Miracle-Gro Performance Organics All Purpose Plant Nutrition Granules - 2.5 lb., All-Purpose Plant Food for Vegetables, Flowers and Herbs, Feeds up to 240 sq. ft.

Release Rate: starts working in about a week
Application Method: sprinkle on dry soil, mix, water

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#8
7.3  score
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Jobe's Organics

Jobe's Organics Granular Bone Meal Fertilizer, Strong Root Development for Bulbs, Tomatoes, Roses, and Other Flowering Plants, 4 lbs Bag

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12% OFF
#9
7.0  score
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Down To Earth All Natural Fertilizers

Down To Earth All Natural Fertilizers Organic Rose & Flower Mix 4-8-4, 5 lb

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#10
7.0  score
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Down to Earth

Down To Earth Organic Bio-Live Fertilizer Mix 5-4-2, 5 lb

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Buying Guide for the Best Organic Fertilizers

Choosing the right organic fertilizer for your garden or farm is crucial for ensuring healthy plant growth and soil fertility. Organic fertilizers are derived from natural sources and provide essential nutrients to plants while improving soil structure and promoting beneficial microbial activity. When selecting an organic fertilizer, it's important to consider the specific needs of your plants, the condition of your soil, and the type of crops you are growing. Here are some key specifications to help you make an informed decision.
Nutrient Content (N-P-K Ratio)The N-P-K ratio represents the percentage of nitrogen (N), phosphorus (P), and potassium (K) in the fertilizer. Nitrogen promotes leafy growth, phosphorus supports root development and flowering, and potassium enhances overall plant health and disease resistance. For leafy vegetables, a higher nitrogen content is beneficial, while flowering plants and root crops may require more phosphorus and potassium. Understanding the specific nutrient needs of your plants will help you choose the right N-P-K ratio.
Source of Organic MatterOrganic fertilizers can be derived from various sources such as compost, manure, bone meal, blood meal, and seaweed. Each source has its own nutrient profile and benefits. For example, compost is excellent for improving soil structure and microbial activity, while bone meal is rich in phosphorus. Consider the specific benefits of each source and how they align with your gardening goals. If you aim to improve soil health, compost or manure might be ideal, whereas bone meal or blood meal could be better for boosting specific nutrients.
Release RateThe release rate of nutrients from organic fertilizers can vary. Some fertilizers provide a slow, steady release of nutrients over time, while others offer a quicker nutrient boost. Slow-release fertilizers, such as compost and manure, are ideal for long-term soil health and sustained plant growth. Quick-release options, like fish emulsion or liquid seaweed, are useful for addressing immediate nutrient deficiencies. Consider whether your plants need a quick nutrient boost or a steady supply over the growing season.
Soil pH CompatibilityDifferent organic fertilizers can affect the pH level of your soil. Some fertilizers, like lime, can raise soil pH, making it more alkaline, while others, like sulfur, can lower it, making the soil more acidic. It's important to test your soil's pH before choosing a fertilizer to ensure compatibility. Most plants prefer a slightly acidic to neutral pH (6.0-7.0). If your soil pH is outside this range, select a fertilizer that will help bring it closer to the optimal level for your plants.
Application MethodOrganic fertilizers come in various forms, including granular, liquid, and powder. Granular fertilizers are easy to apply and provide a slow release of nutrients. Liquid fertilizers are quickly absorbed by plants and are ideal for foliar feeding or addressing nutrient deficiencies. Powdered fertilizers can be mixed with water or applied directly to the soil. Consider the ease of application and the specific needs of your plants when choosing the form of fertilizer. For example, liquid fertilizers are great for container plants, while granular options are suitable for larger garden beds.

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